GMC SIERRA GRANDE 25
Built: 1977-1979 · Series: SIERRA
More machines from model year 1977
Not the right version? The data comes from vehicle registers holding many near-identical versions side by side. Photograph the data plate — we read make and type from it. Open the scanner e-mail address required
GMC Sierra – Heavy Duty pickup of the 2500 and 3500 class: six- and eight-cylinder engines from 110 to 332 kW, 3.0 to 7.4-litre displacement, up to 6,150 kg gross weight
GMC has run the Sierra since 1987 as a standalone pickup model, technically related to the Chevrolet Silverado, and since 1999 as a fully separate range within General Motors; the Sierra family is built at, among other plants, Fort Wayne (Indiana), Flint (Michigan) and Silao (Mexico). The 1500, 2500 and 3500 numbers order payload class, the HD (Heavy Duty) suffix denotes the reinforced three-quarter- and one-ton versions with leaf-sprung rear axles, and trim levels such as SLE, SLT, AT4 and Denali range from work-focused to luxury specification.
Read on 3 more paragraphs
The register lists 63 versions with 110 to 332 kW from six- and eight-cylinder engines of 2,990 to 7,441 cm³, unladen weights of 2,095 to 3,810 kg, gross vehicle weights of 3,500 to 6,150 kg and widths of 1,950 to 2,490 mm.
In the Heavy Duty class the Sierra competes chiefly with the Ford F-250/F-350 and Ram 2500/3500 on towing and payload capacity; typical uses are construction and agriculture, horse and boat transport, and commercial fleets, where the Duramax turbodiesel paired with the Allison automatic is valued as a tow vehicle.
When buying used, check the injection pump, turbocharger and exhaust aftertreatment (DEF) on Duramax diesels, cylinder deactivation and oil consumption on the petrol V8s, frame corrosion at the rear leaf-spring mounts generally, and wear on the hitch ball and trailer wiring on frequently used tow vehicles; parts run through the GMC and GM parts network.
Sources: SpecCodex register, model data: GMC Sierra, GMC
Technical data
Engine
| Cylinders | 8correct |
|---|---|
| Displacement | 5,700 cm³correct |
Dimensions and weights
| Length | 5,480 mmcorrect |
|---|---|
| Width | 2,100 mmcorrect |
| Wheelbase | 3,360 mmcorrect |
| Unladen weight | 2,146 kgcorrect |
| Gross vehicle weight | 3,500 kgcorrect |
Drivetrain and chassis
| Wheels | 4correct |
|---|
Frequently asked questions
How much does the GMC SIERRA GRANDE 25 weigh?
The unladen weight is 2,146 kg.
What is the gross vehicle weight of the GMC SIERRA GRANDE 25?
3,500 kg.
What engine does the GMC SIERRA GRANDE 25 have?
8 cylinders, 5,700 cm³ displacement.
What are the dimensions of the GMC SIERRA GRANDE 25?
5,480 mm × 2,100 mm.
When was the GMC SIERRA GRANDE 25 built?
Production years: 1977-1979.
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Check the weights in the papers against the figures here — attachments change them.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
We do not sell machines. We ask the dealers who carry this model and come back with price and lead time.
Request a quote →
We ask the suppliers and come back with price and lead time.
Request spare parts →
This page carries 10 individual figures for this model. They come from 2 recorded sources; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
The technical data on this page comes from official vehicle registration records (RDW/Traficom), not from the manufacturer.
Missing a figure you were looking for? Report it →
Know this machine better? Have a photo, a manual, or know that a figure is wrong? Add it to the register →
Other models in this series
SIERRA 1500 AT4X AEV-Edition W
SIERRA 1500 DENALI-W
SIERRA 1500 ELEVATION-W
SIERRA 2500 CREW PICK UP/3900
SIERRA 2500 HD 4x4 CREW CAB/3890
SIERRA 2500 HD 4x4 CREW CAB/4040
SIERRA 2500 HD Denali
SIERRA 2500 HD EXTENDED CAB-4X4
SIERRA 2500 K2500 Denali
SIERRA 2500 PICK UP-GK24J-4X4/3340
SIERRA 2500 PICKUP FK29S-4X4/359
SIERRA 2500 SLT
Sources: RDW — Dutch national vehicle register (retrieved August 2026) · How we check the data
Truck in 3D section
Turn the model, look inside and click an assembly — each one is explained.
